The Sony ACC-CSBN Accessory Kit For Cyber-Shot Cameras is a package consisting of the Rechargeable Battery Pack NP-BN1 and the Battery Charger BC-CSN/BC-CSNB, which is used to revitalize its life. This kit is designed for use with a broad array of Sony Cyber-shot digital cameras. The NP-BN1 features a maximum output voltage of 4.2 VDC, 2.3 Wh of power, and a capacity of 630 mAh. The charger provides 2.0 W of power and a charging time of approx. 185 min.